<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<body>
    <form method="post" action="login">
        用户名:<input name="username" type="text"><br><br>
        密码 :<input name="password" type="password"><br><br>
        <button type="submit" >登录</button>
    </form>
</body>
</html>